Here we have the CPU and the speech synthesizer, separated from the main board. Both chips have a few external capacitors, while the CPU also has a crystal to generate its 3.58 MHz clock frequency.

Here we have an overview of the complete CPU. The two green squares that take up half the chip's area are banks of memory. These most likely contain the program that makes Furby do what it does: the words it can say, the way it moves, the way it responds to stimuli. The rest of the chip is taken up by the actual processor, which is most likely some common microcontroller architecture, like an 8051, Z80 or 6502 core.

On this corner we find the logo of the CPU's manufacturer: Sunplus, a chip maker from Taiwan. They're specializing in chips for consumer products, such as cameras, audio appliances, and apparently also toys.

On another corner we find this text, probably indicating an internal product code (PAS280). On the right edge of the chip there are also some test circuits, which are used in the factory to check if the wafer has been processed correctly. After testing, these circuit are no longer needed and they're destroyed when the individual chips are cut out from the wafer.

Here's a close-up of some circuits. On the right is a bunch of digital circuits that form part of the processor. The lower left shows an array of RAM. Finally, the circuits in the centre are probably some analog circuits such as timers or references.